Spherically Mounted Retroreflectors
What is SMR?
A Spherically Mounted Retroreflector (SMR) is a precision measurement tool used with laser trackers. It’s a small, hollow sphere containing a three-mirror retroreflector that sends incoming laser light back to its source. This allows the tracker to accurately gauge the SMR’s spatial position.
Who is this for?
An SMR is for professionals in industries such as manufacturing, aerospace, and automotive, who need precise measurements for tasks like alignment, calibration, inspection, and assembly verification. It’s particularly useful for those utilizing laser trackers and is the main accessory for the Radian Laser Tracker.
Under 2,5 µM
When to Replace SMR
Cleaning dust from the SMR optic with a rag or other abrasive material scratches the gold plating and diminishes SMR accuracy.
DROPS AND BREAKS
An SMR should be replaced if it is dropped. Although API’s SMRs are break-resistant, dropping an SMR can flatten out the surface of the outer ball. An SMR with a flat spot causes centering inaccuracy.
CONFIDENCE IN ACCURACY
Inaccurate SMRs reduce productivity and increase operator frustration and costs. Regularly check or replace SMRs to have confidence in measurement accuracy.